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11th March 2016, 10:17 AM
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Join Date: May 2012
Re: IBPS Shortcut Methods

There are so many tricks to solve the aptitude questions in the bank exams, and it was more essential one to save time and complete our exam on time.

Aptitude Math Shortcuts

Percentage

Percent is derived from a phrase in latin “per centum” which means per hundred. It is a ratio with base (denominator) 100. It evolved as a concept so that there can be a uniform platform for comparing different values.

To express x% as a fraction, divide it by 100 ⇒ x% = x/100

To express a fraction as %, multiply it by 100 ⇒ x/y = [(x/y) × 100] %

x% of y is given by (y × x/100 )

Point to remember for faster Calculation

1 = 100%

1 /2= 50%

1 /3= 33.33%

1/4 = 25%

1/5 = 20%

1 /6= 16.66%

1/7 = 14.28%

1/8 = 12.5%

1/9 = 11.11%

1/10 = 10%

1/11 = 9.09%

1/12 = 8.33%

Shortcuts

If X’s income is a% more than Y’s income, the Y’s income is less than X’s income by

[ a / (100+a)] * 100%

If ‘M’ is x% of ‘N’ and ‘P’ is y% of ‘N’ then

‘M’ is (x/y) * 100% of ‘P’.

If the sides of the triangle, rectangle, square, circle, rhombus etc is

(i) Increased by a%. Its area is increased by

2a+(a2/100)

(ii)If decreased b%. Its areas is decreased by,

-2b+(b2/100)

The population of a town is ‘P’. It increased by x% during 1st year, increased by y% during 2nd year and again increased by z% during 3rd year. The population after 3 years will be,

P *[(100+x)/100] * [(100+y)/100] * [(100+z)/100]

For more shortcuts here is the attachment
Attached Files
File Type: pdf Aptitude Math Shortcuts.pdf (281.6 KB, 87 views)


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